From a0c841b85d88b1ff3c29d8dc66658750e53b0e8b Mon Sep 17 00:00:00 2001
From: Miroslav Ondra <ondra@faster.cz>
Date: Wed, 24 Mar 2021 13:09:34 +0100
Subject: [PATCH] Fix ioctl 0x5480 for Linux>5.0 (set uart timeout)

---
 modules/unipi/src/unipi_tty.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/modules/unipi/src/unipi_tty.c b/modules/unipi/src/unipi_tty.c
index 5571970..b59f664 100644
--- a/modules/unipi/src/unipi_tty.c
+++ b/modules/unipi/src/unipi_tty.c
@@ -940,6 +940,16 @@ static int unipi_tty_ioctl(struct tty_struct *tty, struct file *file,
         retval = read_cnt(ldata);
 		up_write(&tty->termios_rwsem);
 		return put_user(retval, (unsigned int __user *) arg);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0)
+    case 0x5481:
+	case 0x5480:
+		if (tty->ops->ioctl != NULL) {
+			retval = tty->ops->ioctl(tty, cmd, arg);
+			if (retval != -ENOIOCTLCMD)
+				return retval;
+		}
+        // fall through
+#endif
 	default:
 		return  n_tty_ioctl_helper(tty, file, cmd, arg);
 	}
-- 
2.34.1